Last updated: February 26, 2025
In Carnac, France, September unveils a delightful mix of mild temperatures and a refreshing sea breeze. The month experiences a maximum temperature of 27°C (81°F), while the average hovers around a comfortable 17°C (63°F), making it an ideal time for both outdoor exploration and leisurely strolls. With a minimum of 10°C (51°F), evenings can be pleasantly cool. Expect some wet days, as 41 mm (1.6 in) of precipitation falls across 9 rainy days, bringing a touch of life to the lush landscape. The air carries a humidity level of 79%, contributing to the vibrant yet crisp atmosphere of this beautiful coastal region.
In September, Carnac, France, transitions gracefully from summer's warmth to the cooler embrace of autumn. With minimum temperatures around 10°C (51°F), the month starts on a comfortable note, while the average climbs to a pleasant 17°C (63°F). Daytime highs can reach a balmy 27°C (81°F), offering ideal conditions for outdoor adventures amid the stunning megaliths. As the sun sets earlier and the air begins to chill, visitors can enjoy the lingering warmth of the season before cooler temperatures settle in. This gradual shift not only highlights the beauty of this coastal town but also invites exploration, making September a delightful time to experience Carnac’s charm.
September in Carnac, France, marks a subtle transition in weather patterns as summer begins to wane. With precipitation measuring just 41 mm (1.6 in) over nine rainy days, this month is one of the drier periods of the year, reflecting a dip in rainfall compared to the preceding months of August and July. This trend of decreasing precipitation continues into the autumn, positioning September as a bridge between the lush, rain-soaked summer months and the wetter conditions of October, which typically sees a significant increase in rain to 93 mm (3.7 in). The mild rainfall in September adds to the charm of this coastal town, offering a pleasant backdrop for visitors seeking to enjoy the last warm days of the season.
As summer fades into autumn, September in Carnac, France experiences a slight dip in humidity, averaging around 79%. This marks a gradual decline from the peak summer months, where July and August recorded lower humidity levels of 77% and 78%, respectively. The trend shows that while the beginning of the year features consistently high humidity—hovering around 82-83%—the transition into fall brings a subtle retreat towards these higher levels, with October climbing back up to 82%. This harmonious fluctuation illustrates the dynamic balance of moisture in the air, enhancing the charming coastal atmosphere that Carnac is famous for.
As summer fades into autumn, September in Carnac, France, sees a noticeable drop in the UV Index, which stands at 6, placing it in the high exposure category. With burn times increasing to 25 minutes, it's a gentle reminder that while the sun is still strong, it's not as fierce as the peak months of June and July, which recorded a UV Index of 9 and extremely short burn times of just 15 minutes. This transition from the intense summer sun to a more moderate level of UV exposure highlights the changing seasons, offering a perfect opportunity for outdoor activities while still being mindful of sun protection. For more detailed information, check out the full Carnac UV Index.
UV Risk Categories
As summer winds down, September in Carnac, France still basks in a generous 337 hours of sunshine, providing a delightful transition into autumn. This month, while it experiences a notable decline from the sunlit peak of July (429 hours), still holds more light than the earlier months of the year, like January and February, which struggled with just 144 and 206 hours, respectively. The trend illustrates that despite the approach of cooler days, the golden rays of early fall continue to bless Carnac, making it a charming time to explore the picturesque landscapes and historic sites. This comforting warmth lingers, tempting visitors to savor the vibrant end of the summer season before the sunshine starts to fade more dramatically in October and the winter months ahead.
September in Carnac, France, marks a delightful transition into early autumn, boasting a 51% chance of sunny weather. This moderate likelihood is reflective of a gradual increase in sunshine opportunities as the summer months progress; from a mere 28% in February, the chances climb steadily throughout the spring and summer, reaching a peak of 50% in August. As the warm season begins to wane, the sunny days in September remain plentiful, offering visitors a lovely blend of summer's lingering warmth and the crispness of fall. With a higher probability of sunshine compared to the surrounding months, September is an enticing time for those looking to enjoy the charm of Carnac under clear blue skies.
As summer gently fades into autumn, September in Carnac, France, offers a delightful transition with approximately 12 hours of daylight. This month marks a subtle decline from the sun-soaked 15 hours experienced during the height of summer in June and July, reflecting nature's shift towards shorter days. While the daylight begins to wane compared to the vibrant months of May and June, it remains generous enough for residents and visitors to enjoy the lingering warmth of late summer. As we move deeper into the fall, the gradual decrease in daylight hours serves as a reminder of the seasonal rhythms, setting the stage for the cozy charm of October.
In September, Carnac experiences a gentle shift in the wind, with average speeds dropping to 4.7 m/s (11 mph), the lowest of the year. This transition from the summer breezes reflects a broader trend of decreasing winds as the seasons change, following a peak in January at 6.5 m/s (14 mph). Unlike the lively gusts of the preceding months, September's softer winds create a tranquil atmosphere perfect for enjoying the region's stunning megaliths and picturesque landscapes. As autumn approaches, the winds pick up slightly again in October, but the serene September breeze invites visitors to appreciate the calm before the cooler months ahead.
The weather in Carnac changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Carnac and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 17°C (63°F), while January's temperatures drop significantly, with a minimum of -2°C (29°F) and a maximum of 14°C (57°F), averaging only 8°C (47°F). Precipitation is also distinct; September sees 41 mm (1.6 in) of rain over 9 days, compared to January's 56 mm (2.2 in) across 11 days. Additionally, humidity levels remain high in both months, with September at 79% and January slightly higher at 82%. For those interested in more details about winter weather conditions, visit Carnac weather in January.
September and February present quite contrasting weather experiences. In September, temperatures range from a mild 10°C (51°F) at night to a warm 27°C (81°F) during the day, with an average temperature of 17°C (63°F). The month typically sees 41 mm (1.6 in) of precipitation over about 9 days, accompanied by a comfortable humidity level of 79%. In stark contrast, February is much cooler, with temperatures dipping as low as -3°C (27°F) and peaking at a mere 15°C (59°F), averaging around 9°C (48°F). Precipitation increases to 77 mm (3.0 in) over approximately 13 days, and humidity is slightly higher at 83%. For more details on the chilly February weather, you can check out Carnac weather in February.
When comparing the weather in September and March, it's clear that September offers milder temperatures, with averages around 17°C (63°F) and a maximum of 27°C (81°F). In contrast, March experiences cooler temperatures, featuring a minimum of -4°C (25°F) and an average of just 10°C (50°F). Additionally, while September sees less precipitation with 41 mm (1.6 in) over about 9 days, March is wetter, with 65 mm (2.6 in) falling over approximately 13 days. Humidity levels are similar, hovering around 79% in September and 81% in March. For more details on the weather during this time, check out Carnac weather in March.
September and April present contrasting weather conditions. In September, temperatures range from a cool 10°C (51°F) to a warm 27°C (81°F), averaging around 17°C (63°F). With a total precipitation of 41 mm (1.6 in) over about 9 days, the humidity sits at 79%, creating a relatively comfortable atmosphere. In comparison, April features lower temperatures, with a minimum of 3°C (37°F) and a maximum of 20°C (69°F), averaging 12°C (53°F). Precipitation is slightly higher at 42 mm (1.6 in) over 8 days, while humidity is slightly elevated at 82%. For more details on April weather, you can check Carnac weather in April.
September generally offers warmer temperatures compared to May, with an average high of 27°C (81°F) compared to May's maximum of 24°C (76°F). The minimum temperatures in September are also higher, starting at 10°C (51°F) versus May's 5°C (42°F). However, May experiences slightly more precipitation, averaging 58 mm (2.3 in) over 11 days, compared to September's 41 mm (1.6 in) over 9 days. Humidity levels remain fairly similar, with September at 79% and May at 82%. For more detailed insights into the weather during May, you can check Carnac weather in May.
In comparing the weather in September and June, we see some notable similarities and differences. Both months have the same minimum temperature of 10°C (51°F) and an average of 17°C (63°F), indicating a generally mild climate. However, June tends to be slightly warmer with a maximum temperature of 28°C (82°F) compared to September's 27°C (81°F). Precipitation is more frequent in June, with 65 mm (2.6 in) over 11 days, while September experiences less rain, measuring 41 mm (1.6 in) over 9 days. Humidity levels are quite similar, hovering around 79% in September and 80% in June. For a detailed look at specific conditions, you can check Carnac weather in June.
In September, temperatures show a slight dip compared to July, with a minimum of 10°C (51°F) and an average of 17°C (63°F), whereas July has a minimum of 12°C (54°F) and averages 19°C (66°F). The maximum temperatures are similar, with September reaching up to 27°C (81°F) and July peaking at 28°C (82°F). Precipitation is slightly less in September at 41 mm (1.6 in) over 9 days, compared to July's 46 mm (1.8 in) over 8 days, making September a bit wetter overall. Humidity levels are similar, with September at 79% and July at 77%. If you're looking for more detailed insights, check out the Carnac weather in July.
The weather in September tends to be slightly cooler than in August, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), compared to August's minimum of 13°C (55°F) and maximum of 28°C (82°F). While both months experience a similar amount of precipitation over approximately nine days, September is generally drier with 41 mm (1.6 in) of rain, compared to 50 mm (2.0 in) in August. Humidity levels remain comparable, with September at 79% and August slightly lower at 78%. For more details on the August weather specifics, you can view Carnac weather in August.
September weather is generally warmer, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), and an average of 17°C (63°F). It also sees less precipitation at 41 mm (1.6 in) over about 9 days, and a humidity level of 79%. In contrast, October experiences cooler temperatures, with lows dropping to 6°C (42°F) and highs reaching only 20°C (68°F), averaging around 14°C (58°F). This month also brings increased rainfall, totaling 93 mm (3.7 in) across 11 days, and slightly higher humidity at 82%. For those interested in more detailed insights, check out Carnac weather in October.
In comparing the weather between September and November, it is evident that November is significantly cooler, with average temperatures dropping from 17°C (63°F) in September to just 11°C (52°F). The temperature range also narrows, with September peaking at 27°C (81°F) compared to November's maximum of 17°C (63°F). Furthermore, November experiences increased rainfall, totaling 87 mm (3.4 in) over 12 days, whereas September has only 41 mm (1.6 in) across 9 days. Humidity remains fairly consistent between the two months, slightly rising from 79% in September to 81% in November. For more detailed weather information, you can check Carnac weather in November.
September and December present quite contrasting weather conditions. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 27°C (81°F), with an average of 17°C (63°F). The month receives relatively low precipitation of 41 mm (1.6 in) over 9 days, paired with a humidity level of 79%. By December, temperatures drop significantly, with a minimum of 2°C (37°F) and a maximum of 14°C (58°F), averaging just 10°C (50°F). This month experiences much higher rainfall at 121 mm (4.8 in) across 17 days, and humidity increases slightly to 82%. For more insights into the December climate, visit Carnac weather in December.
As summer gives way to autumn, September in Carnac brings a pleasant transition in weather. With an average temperature of around 17°C (63°F), it's milder than the peak warmth of July and August but still enjoys some delightful sunny days, reaching highs of 27°C (81°F). However, the month is also marked by an increase in humidity at 79% and an uptick in precipitation, averaging 41 mm spread over 9 days. This combination creates a refreshing atmosphere, making it an ideal time for outdoor adventures. For a deeper dive into Carnac's unique weather patterns, explore Carnac Climate.